PRO2A LEFT HAND 10.5" 300 Blackout 1/8 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can
Product Overview
Take full advantage of the hard-hitting 300 BLK cartridge with the PRO2A Left Hand 10.5" 300 Blackout Pistol Length Melonite M-LOK Upper with Flash Can. Engineered specifically for Southpaw shooters, this factory-assembled complete upper receiver removes the mechanical hurdles lefties traditionally face on standard AR platforms. Featuring a highly durable 10.5-inch 4150 CMV Melonite barrel, an extended 12-inch free-float M-LOK rail, and a linear flash can, this premium upper safely pushes sound and concussive forces downrange. WIth the optional BCG, It is ready to drop directly onto your standard AR-15 lower receiver configured as a pistol or a registered Short Barreled Rifle (SBR).
Key Features
- True Left-Hand Ejection Port: Mirrored upper receiver design throws spent brass and blowback gases out to the left side, keeping your eyes and sight lines safe and completely clear.
- Blast-Forwarding Linear Flash Can: Directs muzzle noise, unburnt powder, and concussive waves away from the shooter, creating an incredibly comfortable shooting experience under covered awnings or in indoor ranges.
- Premium Melonite (QPQ Nitride) Finish: The high-grade 4150 CMV steel barrel is treated inside and out with a liquid Nitride layer for superior surface hardness, defense against throat erosion, and long-term weather resistance.
- Versatile 1:8 Twist Rate: The precision button rifling handles a broad spectrum of 300 Blackout ammo, stabilizing supersonic hunting rounds and heavy subsonic configurations flawlessly.
- Extended 12" Slim Free-Float Handguard: Shrouds the pistol-length gas system and embeds the base of the flash can, offering maximum grip space and modular M-LOK real estate for lights, lasers, and accessories.
Technical Specifications
| Caliber / Chamber | 300 AAC Blackout (300 BLK) |
|---|---|
| Barrel Length | 10.5 Inches |
| Barrel Material | 4150 Chrome Moly Vanadium (CMV) Steel |
| Twist Rate | 1:8 Twist Button Rifled |
| Barrel Finish | Melonite / QPQ Nitride Finish |
| Gas System Length | Pistol-Length Gas System with 0.750" Low Profile Gas Block |
| Upper Receiver | Left-Hand Ejection Forged 7075-T6 Aluminum, M4 Feed Ramps, Forward Assist & Dust Cover Installed, Type III Hardcoat Anodized |
| Handguard | 12" Premium Slim Free-Float M-LOK Handguard (6061-T6 Aluminum) with Full Top Picatinny Rail |
| Muzzle Thread & Device | 5/8x24 TPI; Premium Slimline Blast-Forwarding Linear Flash Can |
| Manufacturing Origin | 100% Made in the USA; Lifetime Warranty |
Why Choose the PRO2A Left-Hand 300 BLK Flash Can Upper?
The 300 Blackout cartridge is optimized for short-barreled setups, making a 10.5-inch barrel the perfect sweet spot for maximizing ballistics while keeping the weapon compact. However, standard right-handed uppers vent heavy gas blowback directly toward a left-handed shooter's face—a problem magnified when using a suppressor or shooting short barrels. The Pro2A Left-Hand Complete Upper solves this completely. By pairing a true left-side ejection layout with a linear flash can that drives concussive forces away from your workspace, Pro2A provides a safe, comfortable, and reliable shooting experience. Factory range-tested and constructed from premium American components, this upper is ready to serve as a high-performance foundation for your Southpaw build.
